Brihard, have a look at the following link as a place to start, no money needed as it's a package available online from the Defense Language Institute out of Monterey,California. It has quite a broad range of language areas covered, everything from Command and Control phrases to basic greetings etc. You can get your fill of Pashto or pick from a various selection of other languages applicable in today's operating environments. Many of the country specific overviews available are quite informative as well, regional backgrounds, ethnic profiles etc....Anyways, have a look for yourself...
If you are just starting out in Pashto (I'm in the same boat) I suggest starting with these files (.zip download)
Pashto Basic LSK (PDF, Mar 2005) - pdf you can use to follow along with audio
Pashto Basic LSK (PDF audio companion, Mar 2005) - mp3 audio files
http://fieldsupport.lingnet.org/downloads.html
cheers.