Bismillah...
Siti Hayaa', out of interest, why do you need to study the refutations of the Ibn 'Abdul-Wahhabi's? I ask this becuase generally scholars start with Fard 'Ayn before moving on to Fard Kifayah and as we know it is not mandatory to use refernces. Look at the works of the Madhhahib. In most books on Furu' you will find hardly any references yet they are backed up when we actually go and check...
An example of what I am saying can be illustrated in the following: When studying Fiqh, would you memorize each vidence of each Hukm? If yes, it would probably take you a year or more to get through the 'Ibadaat. So what we do is learn the proofs for the Usul, realize that they the Furu' really are derived from these by going through a few examples and then get on with mastering the Furu'.
These days, those well-educated in the secular sense get caught up in the DIY Islam thing. I will just list one of their arguments and demonstrate the shallowness of thought:
They say: You follow Imam ash-Shafi'i (for example). How does he know all the Ahadith? And if you follow him while awair of a Sahih Hadith contrary to the Madhhab, then you are mistaken following the Imam.
I say: The Muqallidin of a given Madhhab are not making Taqlid of 1 Imam. Rather the Imam played a significant role in developing the Usul - Method of understanding the source texts (for example "what to do with the Athaar of the Sahabah"). They studied with many of the greatest teachers of their times and had many students who revised the Usul and if they found a Hadith (for example) not yet incorporated into the Madhhab, they would analyze it according to the Usul and act accordingly. This happened century after century for at around 1000 + years.
Thus the Madhhab incorporates ALL the Ahadith in a systematic manner. Ignoring 1000+ years of the cross-generational co-orporation from a civilisation whose very topic of enduring interest was the science of Islam is a very stupid thing to do. Off course this does not eliminate questioning but I guarantee you, ask a question about evidences and the scholars have definately already dealt with it unless the topic was not around at the time.
By the way, here are a great set of articles on Ibn 'Abdul-Wahhabis:
The Re-Formers of Islam Excerpts
The Mas'ud Questions
The Q-News Articles
Lectures Transcripts
Here is the Shaykh's analysis of the theory of evolution:
http://masud.co.uk/ISLAM/nuh/evolve.htm
Keep me in your duas,
Wassalam