I've been having a ton of fun with my new toy, installing software and files (music, photos, e-books). Of course, now I'm running out of room.

I've got a 512 Mb SD card (I live in a small town in Texas, not too many places to run out to get tech on my workdays. I have Sun / Mon off, so I can drive into Dallas and get a 2 G one then

) The problem is my internal memory.
I just want to make sure of a couple of things before I go on a deleting rampage.
I have Docs-To-Go and PalmPDF. Do I really need Adobe Reader? As far as I can tell, it only finds files in the internal memory; once I moved the .pdf files to the card, it's become
useless. It also would not read a favorite conversation starter of mine,
God's Debris by Dilbert creator Scott Adams (it's a free download from his site) Adobe Reader for Palm would not convert it or sync it. I used the Missing Sync to mount the internal card, made a BOOKS folder, and dropped it in. PalmPDF read it like a champ.
I got PocketTunes, thanks to everyone's kudos here on the forum. Do I need RealPlayer? I've hated their horrible support (or lack thereof ) for the Mac.

I don't want Real software tainting my lovely Treo. I know I have Adobe Reader on the install CD that came with my phone, but can I restore RealPlayer if I need it?
edit: I found the download page.
Time to kill Real!
Lastly, I began my application deletions with FileZ. I now am using Destaller, since it also removes associated files. I'm sure I left some crud when I deleted some stuff. Is there a utility that erases orphaned files? There's a ton of stuff that FileZ pulls up, but I have no clue what belongs to whom.

And now that the app itself is gone, Destaller doesn't seem to recognize them.
Any suggestions?