Do what Techhead said first, get the company's past history. You can buy a copy of any document lodged with the CRO. I pay an annual fee to get unlimited access to this info. I'd be lost without it.
When hiring advisors, get ones with experience in buying companies. Most will be qualified accountants (don't get a financial advisor like me, we have no experience in buying companies!!), but make sure they have experience in this area. It may cost you a few quid extra as you may have to go to one of the bigger firms, but it is better to get it done right instead of having someone making a mess of things for you. Same for the solicitor you use for the documentation.
Steven
http://www.bluewaterfp.ie (www.bluewaterfp.ie)