Force Post ID to a certain number on my Wordpress XML import plugin

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2
Avg Bid (USD)
$5 / hr
Project Budget (USD)
$2 - $8 / hr

Project Description:
Im using the Feedwordpress plugin and I need post ID to be forced as the number I have inside in my xml file
I figured out how to force post_name but couldnt figure out how to force the post ID instead of having it autoincrement on new posts
When subsequent updates are imported if the Post ID is there already that is fine that it just updates that same Post ID
I have enclosed the file that Im pretty sure need to be edited - its fine if its done in a hacky sort of way I just need the post ID forced

I can do the testing I just need you to edit the file and send it back to me and I can do trial and error I dont wish to give db or ftp access for this

Hours of work: Unspecified Project Duration: < 1 week Skills required:
Wordpress
Additional Files: syndicatedpost.class.php
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$7 / hr
Hours: 2 hr/ week
Hire sanskarsanskar
$2 / hr
Hours: 40 hr/ week