Mac to PC Partitioning?

[carnology]

To give you a little information, I am currently recording on a Pro Tools HD3 Mac System and trying to use the files back and forth between Mac HD3 and a Pro Tools LE 7.3.1 Windows XP Pro system. When booting up a box pops up and says, "HFS + Disc Support Partition Conflict." Then says to repair this disc choose the correct disc type listed below. Then it lists these three options: (1) this is supposed to be a Mac disc (2) this is supposed to be a PC disc (3) I don't know whether it should be Mac or PC disc. Then says, " The disc Lacie D2 external contains both Mac and PC Partitions." Which option should I select? What partitions should I have on the Lacie to move files back and forth? Should I have Mac and PC Partitions or just PC Partitions?

Thank you once again DUC!

Digi 002R
Pro Tools LE 7.3.1
Windows XP Pro (SP2)
DELL Inspiron 9300
Intel Pentium M Processor 760
(2 GHz/2MB Cache/533MHz FSB)
Memory 1 GB Dual Channel DDR2 SDRAM at 533MHz
Video Card 256MB NVIDA GeForce (Go 6800)
Maxtor Internal HD 60GB 7200rpm
Lacie d2 Extreme HD 320GB 7200rpm Firewire 400/800 USB 2.0
CD/DVD 8x burner w/ double-layer capability
Network Card Integrated 10/100 Network Card and Modem
Wireless Networking Card Intel® PRO/Wireless 2200 Internal
Wireless (802.11 b/g, 54Mbps)