wanna try create new theme using TM 1.1.7

when I open NuvoPearl-template.psd provided in zip, I get message from Adobe Photoshop - "not enough RAM"

there are 1.5 Gigs free RAM (2G total) plus 2 Gigs in swap at this time...

probably something wrong with this psd

or may be I'm using too old version of Photoshop (6.0) but I didn't get any similar problem before