The software you use to record normally has an option available to increase recording volume, although you may have to look for it (perhaps hidden in tools or preferences). If it doesn't have this option you could perhaps try another program. Many people here recommend the free program audacity-
http://audacity.sourceforge.net
There are lots of wav to mp3 converters on the Internet but many have strings attached. One I use which is very basic but does the job is called wave@mp3. Just google for it.
To host the files I just put them in the recording booth on this site -
http://www.guitarforbeginners.com/fo...splay.php?f=31. Just start a new thread in the recording booth and click on the manage attachments button near the bottom of the page to upload your file.
Keep at it Chris as it's always good to hear the fruits of other forum members labours.
Simon