1) About the broken link
That's odd ???
, try this link:
http://filebase.bots-united.com/inde...ion=file&id=49
If even this doesn't work, just select "Filebase" from the blue menu bar (towards the top left of the screen), then "waypoints" and finally "PODBot mm" - this will bring up a list of all available files and packs.
2) About the maps you mentioned
The thing is, I hate those aim, fun and whatever maps. I prefer serious de, as and cs maps. That's why I have hardly waypointed any aim maps and stuff. However, I can't believe that there are no PODBot 2.5 waypoints for these maps, and for such simple maps, 2.5 waypoints should do. Wait a minute...
http://waypoints.ath.cx/nc/index.html
Try this site... select "waypoints PODBOT" from the menu, and then the topmost category... you should find many aim maps waypointed there.
PODBot 2.5 and PODBot mm waypoints are technically 100% compatible; there are just some non-critical issues. And PBmm has a far better waypoint editor, which is why you can be much more precise and whip up far better waypoints than with the old PB 2.5 editor. So if you can get your hands on a good quality PBmm waypoint, you can be sure that it will perform better than PB 2.5 waypoints for the same map. But if you can't, a 2.5 file should be ok on simple maps.
3) About making waypoints
Is it difficult? It depends... Technically, it's easy. It's very graphical, you don't need any programming skills. There are not too many waypoint types to remember, either. It's the details that can be hard to get right. Making really good waypoints takes time, diligence and nerve. And some experience, of course. But you can always look at existing files to get some inspiration or to see how a waypointer solved things. Wait a second...
http://forums.bots-united.com/showthread.php?t=3099
Follow the filebase link in that thread. In the documentation, you should find a waypointing section. I wrote it, and I tried to cover all aspects from conveying a general idea what waypoints actually are to the actual layout of waypoints. Make sure you read the last chapter on avoiding common errors. It shows you how NOT to make things - however, once you understood why these errors are errors or why waypoint layout xy is bad, you also know how to do better. Be warned: Reading all that stuff will take a while, it's many pages long. But in the long run, it's worth it.
Phew, I hope this helps.