Both the RNA-PSP and Chem-PSP software packages are available for download by using the below links.
1. Descriptions of RNA-PSP can be found in these publications: Paul DJ, Seedhouse SJ, and Disney MD. Two-dimensional combinatorial screening and the RNA Privileged Space Predictor (RNA-PSP) efficiently identify aminoglycoside-RNA hairpin loop interactions. Nucleic Acids Research, (2009), 37, 5894-5907; Velagapudi SP, Seedhouse SJ, Disney MD. Structure-activity relationships through sequencing (StARTS) defines optimal and suboptimal RNA motif targets for small molecules. Angewandte Chemie International Edition, English (2010), 49, 3816-3818.
Link to download both versions of RNA-PSP
2. Description of Chem-PSP can be found in this publication: Bioorganic Medicinal Chemistry Letters (2010), 20, 1338-1343.