outlook syncin on 900c!!!

I have been trying to sync my 900c w outlook on my xp desktop and found, like others before me I think, that scheduling meetings on the 900c (with e-mails to other attendees) just doesn’t work. Will an OS upgrade fix this? I have also tried using alternate pim’s – specifically the oddyssy pim – but found I need Microsoft Exchange on the desktop to make this work.

Is there another PIM that works with the 900c pim apps and outlook xp (w/o exchange)? Or is there a workaround I am unaware of?