The PTypeID shouldn't matter, the only place where it touches instances is to disambiguate their names at render time. I don't think the particle IDs get reordered on load, unless something happened with the emission.
Did the items in the instance group become re-arranged for some reason? Set the explorer to view things in "Creation Order" and use the re-order tool to get back what you had, if that's the case.
- ½
________________________________
From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On Behalf Of guillaume laforge
Sent: 17-Jan-07 10:45
To: XSI(at)Softimage.COM
Subject: Re: TypeID (Particle) of PType and mixed up instances