girlfriend in jail for violation of probation.wondering if with an attorney if home arrest would be possible?

This sounds like a tough sell.  I don't think any reputable lawyer would promise you that he or she could make this happen, but you have no chance, I'm afraid, without one.  I would hope that the reputable attorney would refuse to take the case, if he or she thought it wasn't worth trying.  And you will have to let an attorney look at all the details of the case, to get reliable advice.

A felony DWI is a very serious start to the matter, as is 5 years probation.  Then she violated probation, then she ran.  It isn't a pretty picture, and it's too easy to see this as a case where jail really is necessary.

Although I do not practice law in the State of New York, here are my initial impressions.  I generally agree with my colleague's comments, however, I'd like to add an additional perspective.  Theoretically, any resolution of a case is "possible."  However, how a case is actually resolved will depend on a myriad of factors, including but not limited to the strength o the state's evidence.  Therefore, without more facts it is impossible to speculate what potential resolutions (such as house arrest) are likely and what resolutions are unlikely.  What I can tell you, however, is that if your girlfriend wants to obtain the most favorable resolution of this matter as possible, she needs to hire an attorney as soon as possible.  Good luck.