mysqldump and server versions

[YL]

Dear list, 
I have a database backup from database in a 5.0.15 server and like to make it 
work in
5.0.1 server. The data need no anything new (like trigger etc) to 5.0.1.
After some testing, by editing the backup file, I was able to make a testing 
database
work (from 5.0.15 to 5.0.1). 
I'm wondering is that always doable or not and is there any guideling of doing 
this?
Thanks a lot for any help/commends.
YL