The PN100 has a slightly lower collector current (500mA as opposed to 600mA for the 2N4401) but slightly higher voltage ratings so it should work ok.

Cheers for that I have used the PN100's and once installed where reading on the multimeter the same as the others 

Ive found marcos postage to be out of this world. I personally would get them made here for less than his postage cost alone.

Yes I did think that when I put an order through last time, I wish he had them in stock then
One thing though, the service was lightning fast, from memory I had my order 5-6 days later.