They told me they don't support using that type of configuration, but we had it running from them at some point... we've been in business with them for over 8 years now. Thing is that we need to upgrade to php5.3 without loosing support for php4.
No idea how to do it. The guys at hostdime already said they wouldn't help with it. However, I know it is possible to somehow (probably recompile apache all over again?).