Here's a guide on how to record and re-amp using a POD XT.
Please watch both of these videos in HD and at full screen size so you can see what's going on.
LINKS:
http://www.free-codecs.com/download/Lame_Encoder.htm Download the zip file, then just extract the lame_enc.dll file and save it to C:\Program Files\REAPER and restart REAPER.