I have tried everything and keep getting the same errors. Neither work by the way (IR200L serial and PVR 250 grey remote). I have installed using knoppmyth. Here is all the info:

tail /var/log/syslog -f &
Mar 14 19:05:01 mythbox /USR/SBIN/CRON[4175]: (root) CMD (nice -n 19 /tv/mythlink.sh)
Mar 14 19:07:27 mythbox kernel: BUG: using smp_processor_id() in preemptible [00000001] code: modprobe/4234
Mar 14 19:07:27 mythbox kernel: caller is init_port+0xb1/0x290 [lirc_serial]
Mar 14 19:07:27 mythbox kernel: [debug_smp_processor_id+140/160] debug_smp_processor_id+0x8c/0xa0
Mar 14 19:07:27 mythbox kernel: [pg0+292751873/1067795456] init_port+0xb1/0x290 [lirc_serial]
Mar 14 19:07:27 mythbox kernel: [pg0+292754218/1067795456] init_module+0x3a/0xa0 [lirc_serial]
Mar 14 19:07:27 mythbox kernel: [sys_init_module+340/528] sys_init_module+0x154/0x210
Mar 14 19:07:27 mythbox kernel: [syscall_call+7/11] syscall_call+0x7/0xb
Mar 14 19:07:28 mythbox kernel: lirc_serial: auto-detected active high receiver
Mar 14 19:07:28 mythbox kernel: lirc_dev: lirc_register_plugin: sample_rate: 0

RELEVANT DMESG OUTPUT:

Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing disabled
ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A

Linux video capture interface: v1.00
ivtv: ==================== START INIT IVTV ====================
ivtv: version 0.4.0 (tagged release) loading
ivtv: Linux version: 2.6.13.2-chw-3 SMP preempt 586 gcc-3.3
ivtv: In case of problems please include the debug info
ivtv: between the START INIT IVTV and END INIT IVTV lines when
ivtv: mailing the ivtv-devel mailinglist.
ivtv0: Autodetected WinTV PVR 250 card (iTVC16 based)
ACPI: PCI Interrupt 0000:00:0b.0[A] -> GSI 18 (level, low) -> IRQ 16
ivtv0: Unreasonably low latency timer, setting to 64 (was 32)
tuner (ivtv): chip found at addr 0xc2 i2c-bus ivtv i2c driver #0
ivtv0: i2c attach to card #0 ok [client=(tuner unset), addr=61]
msp34xx: ivtv version
msp34xx: init: chip=MSP3448W-A2, has NICAM support, simple (D) mode, simpler (G) no-thread mode
msp34xx: $Id$ compiled on: Oct 9 2005 22:52:16
ivtv0: i2c attach to card #0 ok [client=MSP3448W-A2, addr=40]
saa7115 1-0021: saa7115 found @ 0x42 (ivtv i2c driver #0)
ivtv0: i2c attach to card #0 ok [client=saa7115, addr=21]
tveeprom: ivtv version
tveeprom: Hauppauge: model = 32032, rev = B310, serial# = 7044864
tveeprom: tuner = Philips FI1236 MK2 (idx = 10, type = 2)
tveeprom: tuner fmt = NTSC(M) (eeprom = 0x08, v4l2 = 0x00001000)
tveeprom: audio processor = MSP4448 (type = 1b)
tveeprom: decoder processor = SAA7115 (type = 13)
ivtv0: i2c attach to card #0 ok [client=tveeprom, addr=50]
ivtv0: loading /lib/modules/ivtv-fw-enc.bin
ivtv0: Encoder revision: 0x02040011
ivtv0: Allocate DMA encoder MPEG stream: 128 x 32768 buffers (4096KB total)
ivtv0: Allocate DMA encoder YUV stream: 194 x 10800 buffers (2048KB total)
ivtv0: Allocate DMA encoder VBI stream: 120 x 17472 buffers (2048KB total)
ivtv0: Allocate DMA encoder PCM audio stream: 455 x 4608 buffers (2048KB total)
tuner: type set to 2 (Philips NTSC (FI1236,FM1236 and compatibles)) by ivtv i2c driver #0
ivtv0: Initialized WinTV PVR 250, card #0
ttyS1: LSR safety check engaged!
ttyS1: LSR safety check engaged!
lirc_dev: IR Remote Control driver registered, at major 61
cx2388x v4l2 driver version 0.0.5 loaded
lirc_i2c: chip found @ 0x18 (Hauppauge IR)
ivtv0: i2c attach to card #0 ok [client=Hauppauge IR, addr=18]
lirc_dev: lirc_register_plugin: sample_rate: 10
lirc_serial: port 03f8 already in use
lirc_serial: use 'setserial /dev/ttySX uart none'
lirc_serial: or compile the serial port driver as module and
lirc_serial: make sure this module is loaded first
ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A

Here is the error I get:

lircd 0.7.2: there's no hardware I can use and no peers are specified
/etc/init.d/bootmisc.sh: line 117: /sbin/setserial: No such file or directory
lircd 0.7.2: there's no hardware I can use and no peers are specified.

Their is also an error in the dmesg:
lirc_serial: port 03f8 already in use
lirc_serial: use 'setserial /dev/ttySX uart none'
lirc_serial: or compile the serial port driver as module and
lirc_serial: make sure this module is loaded first
ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A

Here is relevant lsmod output:

lsmod
Module Size Used by
lirc_serial 13952 0
ir_common 8836 1 cx88xx
lirc_i2c 10372 0
lirc_dev 14852 2 lirc_serial,lirc_i2c


Ive been following these instructions:
http://mysettopbox.tv/phpBB2/viewtopic.php?t=4462

Tossed the IR-200L to the side and purchased an IR receiver from irblaster.info and everything works perfect with absolutely no issues.