cos im feeling helpful, mean and mockful (is that a word?) i will answer
TWO of your problems!
1. download pakscape v0.11 from this page:
http://www.planetquake.com/maldavria/downloads.html
its a quick download and once you have it, install it and use it to open bid for power .pk3 and .pak files and look for sprites,textures,gfx,etc...
if you find the sprites you need it shouldnt be too hard to convert them.
2. linking to pictures on your hard drive in the esf forums is not gonna work!
upload the picture to somewhere online like website space and link to it there.