Memory Usage Printing Images

I am printing both text and images. The printing is done totally in GDI+ using g.DrawString routines for the text - which gives me great flexability.
I am also adding multiple images to the pages. The biggest of which is a simple sketch generated by another part of the software. The problem:

The program consumes 200-300Megs peak while printing certain pages. these pages have multiple images placed on them with g.DrawImage These images are either 640x480 jpegs reduced down to around 1/2 their size or the sketch image 4500x3200 reduced down to about 450x320.

I can draw the sketch at any size but I am finding if I don't draw it atleast Height * 10 & Width * 10 then the image is very distored when placing it on the page with g.DrawImage

Any Help in reducing the memory usage would be most appricated.