That is for a Haupagge remote. It might work if your IR sensor will pass the codes it receives directly to lirc and doesn't only accept the WINMCE remote commands. Lirc has a command line tool, irrecord, that spews out all the codes it is recieveing. Try it with the pronto config file and see if it works.
Then you'd have to use those two lirc files to replace those already on your box.
Find them by logging into a command prompt as root (su - root) then type 'locate lirc'

It would probably be easier just to train your 7500 with the WINMCE commands.
Have a read of the lirc website http://www.lirc.org/ and the MythTv wiki. That will explain how lirc works and you should be able to set it up to include any extra commands that you need.

Sorry I cant be much more help but lirc config is probably better dealt with on a dedicated forum.. with people who really know what they are talking about :)