[rescue] Install Solaris 10 without CD-ROM, and without another Solaris box. Possible?

[Micah R Ledbetter]

I'm not sure if this is rescue or geeks material, but here goes...
I have a Windows machine at work, a Mac OS X laptop, and an Ultra 2  
running Solaris 9 which I've secreted under my desk. The U2 has no CD- 
ROM, and while I might be able to get one, if I could do it another  
way, it would be less hassle for me. Is there a way I could network  
install (using Mac OS X or Windows/Interix as a host), or upgrade- 
install without a CD drive?

  - Micah