ipb to vb impex issue

[notrious]

Hi there .. I would really appreciate if any one can help me out in this.

I imported data from ipb3 to vb3.8 using impex .. and major issue i am having is posts number order for example.

I am using vbseo and on ipb a url is like

domain.com/forum/9876-helpme (where help me is the post title and 9876 is the post number)

now in vb post number is 5623 and url goes like .. domain.com/forum/5623-helpme

so in short while importing using impex .. it's changing post order .. any one know how to fix it or any idea so during impex import it don't change post id or forum id.

Please badly need this to be done ...

Thanks in advance.