First, you will need to get your hardware upgraded to all 64 bit servers,
including your SQL server.

After that you will need to upgrade to WSS sp2 and MOSS sp2. (You won’t
need to apply SP1 since that is included in SP2)

Then you will need to run the pre-upgrade checker tool and fix issues
identified prior to upgrade.

You will also need to make provisions for upgrading  any customizations you
have created in MOSS 2007. Most of these will not be upgraded automatically

After all that you will be able to upgrade to 2010.

It is not a simple process and shouldn’t be taken lightly. It requires a
lot of detailed planning.

I have a 64 bit environment to work with.

Would I be able to install 64 bit MOSS SP2 on it and then backup and restore my
32 bit MOSS RTM content database to it?

Or do I need to upgrade to SP2 in my 32 bit environment first and then do a
backup/restore to the 64 bit environment?

I've been reading what's out there but just keep getting more confused.

I would attach the content databases to the 64 bit environment first, then
upgrade to SP2, then upgrade to 2010.

Thanks so much for your help. I will try this.