how can I change label of xml field into a different string uding .ini file?

I am in a big stuck for about last 23 days..

I am trying to create a joomla module where I will be able to change the field label with another text.

I am showing what I want to do. Please suggest me or if you know the solution than please let me know.

I am working on joomla 3.x .

Now the problem is below.

in xml file there is a field which is like:

             <field
                name="slides"
                type="slidesmanager"
                label="MOD_SLIDES_LABEL"
                description="MOD_SLIDES_DESC"
                filter="raw"
            />

here the lable is MOD_SLIDES_DESC and I want to show it as slides

So I created a .ini file in the language folder and put MOD_SLIDES_DESC='slides'. but this is not working.

Please suggest me how I can do this. also I want to add javascript in the jooma administrator section and how I can do that too...

waiting for your kind reply..

Thanks in advance..