Hi, it can be done - however due to the ir blocking filter the results will not be good, you will have to use a tripod as the exposure times are very long  5 seconds plus and with zoom lenses there will be a 'hotspot' a ligher circular area of exposure in the centre of the photograph, this is due to the lens consruction - I even had hotspots with a prime lens, again this is due to SLR lens construction. You will have to use a converted camera

or one without the IR blocker - there are few of these Leica M8 works very well - perfect digital IR with handheld exposure times in the order of 39th to 90th of a second but it's a costly way to do it!

Shoot in RAW colour mode at the lowest white balance you can (2000) and covert to b/w you can then manipulate in photoshop or lightroom.

With the right set up the results can be stunning!

Hope this helps

Tony