I would recommend that you do not use split gaiters............they're not particularly reliable and are also fiddly to fit. It's definitely worth buying a proper gaiter.......I paid £9.99 for mine which is not much.
This is the procedure I used;
1. Remove the brake caliper and hook it onto something else........do not let the brake hose take the weight else it may split.
2. Disconnect the upper and lower arm ball joints
3. Disconnect the fork to lower arm
4. Disconnect the track rod end
5. Loosen and remove the bolts that secure the inner CV joint to the gearbox drive flange.
5. Whilst pressing down on the lower arm (the inner CV joint won't pass through the fork), remove the entire hub and shaft assembly.......be careful of the ABS sensor cable.
6. With the aid of circlip pliers, remove circlip from end of drive shaft.
7. Remove clips securing flexible gaiter.
8. With the aid of a puller, remove inner CV joint from shaft and slide boot off also.
9. Loosen and remove damper from shaft.
10. Remove clips securing flexible gaiter to outer CV joint and slide off shaft.
11. Slide replacement gaiter onto shaft.
12. Squirt some grease (sachet supplied with new gaiter) into the joint and secure gaiter using clips provided.
13. Continue as above but in reverse order
FYI, I scribed marks on the drive shaft joints before removal to ensure everything went back in the same position. It probably doesn't make any difference in terms of dynamic balance but who knows?
This worked well for me so hope it helps