Racer445, maybe your solution is the best way to solve this issue (even if a bit rough, hehe). Anyway the script you linked does exactly what I'm looking for, but I can't open it in Max 2008, I suppose it's way too old (and it's also enrcypted). I'm still searching other scripts, hope we find something useful. ;)
Its been a while since I used the old UI but I think its under selection > Perspective Select or PersSel or something similar. I think was added to 4.0 (maybe a 3.0 update?) right before it was included in 2010 so older versions might not have it. Polyboost was included in Max2010 they decided to call it Graphite modeling…