Change Quota Graph from Quota to Warning

My company has a specific need to change the little graph in the upper-left hand corner of the mail template from showing the percent of the quota used to the percent of the warning threshold used.

Does anyone know how I might go about getting that up to date?

I took a quick gander at the calcQuota script (found inside the OpenNTFLibraryUI script library) and found the following line…

dbmax = Fix(db.sizequota/1024)

I was hoping the change would be as easy as updating to db.sizewarning instead of db.sizequota, but that didn´t work.

I would be VERY appreciative if someone could help me out.

Thank you.