Can a MacBook Pro1,1 - 2GHz Intel Core Duo be upgraded to Lion or even Leopard?

Is it possible to upgrade the OS from Tiger to either Lion or Leopard on a MacBookPro1,1  2GHz Intel Core Duo (2006)?  Need to upgrade Adobe Creative Suite and Microsoft software...

Here's something to consider. I see you have 1G RAM. That works well enough for Tiger 10.4. However, I think Leopard or Snow Leopard will be happier if you increase the RAM.
Your MBP can handle up to 2G of RAM. It has two RAM slots'In your case, there would be one 512MB module in each slot. You could replace one 512MB module with a 1G module and have a total over 1.5G. That would be a big help. Or replace both. If you are in the US, RAM is not expensive (see: 2.0GB Upgrade Kit                 (1.0GB Modules x 2 Matched) for US$33), and the RAM is easily installed even by the most novice user.
Here are the Apple Instructions for installing RAM in teh first Gen MacBook Pros:
MacBook Pro (15-inch, Early 2008) and earlier

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