Hi evrbdy!!!
I've been thinking about the major scale and it's relative modes. I've come to the conclusion that when I play keys that are so called "#" keys then it's very easy to alter the notes within the scales in order to go from a different mode to another.
Example: Let's say that I'm playing in E major and then I want to play E phrygian. Then I just lower the 2nd, 3rd, 6th, 7th in order to make it phrygian.

And this goes with all the major scale modes. However, when I play "b" keys, then things get a little tricky because the notes within a "b" are most of the time already flattened. Therefore I'm wondering if there is any other great spelling technique that I can use in order to stay with the same key "name" through out a song e.g I mean is there some way you can spell the notes of Gb phrygian without having to say F# Phrygian, as the Gb phrygian is derived from a "#" key.
Gb= Gb Ab Bb Cb Db Eb F
Gb Phrygian from Gb view is Gb Abb Bbb Cb Db Ebb Fb (it's annoying to think in double flats while improvising)

Why I am asking this question is because I like to improvise by altering a certain scale notes while playing instead of thinking of it's relative major scale and then play it.
It's like if I'd play E major and then an Esus9 chord would appear. Then I flatten the notes within the E scale during my solos instead of thinking of C major.

So, is there a way to get around my problem so that I can stay with the actual keys name without having to change it???
Please give me your thoughts and other stuff.

P.S. English is not my first language

I'm not a jazz pianist, but I would think that you instead want to think in terms of where the half and whole steps lie, rather than lowering this or that note. So in the key of B-flat major, to go to B-flat dorian, your half-steps would be between scale degrees 2&3 and 6&7, or in other words between C-D and G-A. That would spell out B-flat - C - D-flat - E-flat - F -G - A-flat - B-flat.

Phrygian, the half steps are between 1-2 and 5-6. So in the above scenario it would be B-flat - C-flat - D-flat - E-flat - F - G-flat - A-flat - B-flat.