Delete/Insert keys NOT mappable BF4 PC

edit: i found the solution to this, people. follow the steps below:

1. go to

x:\users\<<yourusername>>\documents\battlefield 4\settings

2. open the file "profsave_profile" via notepad

3. search for keywords that describe a certain action (like reload, jump, change firemode etc etc) in the document. once you found your desired action

for instance:

GstKeyBinding.infantry.ConceptToggleWeaponLight.0.button XXX

(XXXs are placeholder for ANY number. usually there's a number there)

4. then you can bind DEL or INS to this action by simply replacing the XXX with

210 for INS

211 for DEL

so that it looks like:
GstKeyBinding.infantry.ConceptToggleWeaponLight.0.button 210

5. save the file and thats it. you can use DEL and INS now. these keys happen to be unmappable ingame but work fine when bound via notepad